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"Out of Equilibrium? The World's Changing Ice Cover"

"Accelerated melting of the glaciers and other frozen masses that make up Earth’s cryosphere has become a widespread phenomenon. ...

Glacial retreat is often described as global warming’s most visually compelling manifestation. But the influence of climate on the cryosphere doesn’t lend itself to simple generalizations. Glaciers, ice sheets, and seasonal snowpack are part of an exceedingly complex climate system with many unknowns."